Conbad pilgbim



(No Model.)

0. PILGRIM.

PELLET FOR TORPEDOES.

, '78. Patented Apr. 2'7, 1886.

N, PETERS. Phnln-Limagnphur. Wanhinglun. n. c.

UNITED STATES PATENT OFFICE.

CONRAD PILGRIM, OF EAST NEW YORK, N. Y.

PELLET FOR TORPEDOES.

SPEGIFICA'LION forming part of Letters Patent No. 340,678, dated April 27, 1886.

Application filed February 6, 1886. Serial No.191,001. (No model.)

To all whom it may concern.-

Be it known that I, CONRAD PILGRIM, a citizen of the United States, residing at East New York, in the county of Queens and State of New York, have invented anew and useful Improvement in Pellets for Torpedoes, of which the following is a specification, reference being had to the accoi'npanying drawings.

The object of myinvention isto rendersuch pellets less liable to be ignited and exploded by exposure to sparks or fire externally applied; and to this end I make an envelope or capsule for inclosing the fulminate of such a pellet of a fireproof composition, in which, while the said composition is in a plastic state, I place the said fulminate.

My invention therefore consist-s, principally, in a torpedo-pellet in which the fulminate is inclosed in an envelope of fire-proof composition. The composition which I have found best suited for such an envelope is mineral wool and an adhesive cement or substance, by which the particles of the mineral wool are bound together; and my invention, therefore, further consists in a torpedo-pellet in which the fulminate is inclosed in an envelope composed of mineral wool and an adhesive substance.

The accompanying drawings illustrate my inventi0n,and the method of its manufacture.

Figure 1 is a central section of a torpedopellet. Fig. 2isaface view of the same. Figs. 3, 4, and 5 are vertical sections of a plate in which the pellet is made, illustrating three stages of its manufacture.

Similar letters of reference indicate corresponding parts in the several figures.

a designates the fulminate, and Z) the envelope of fire-proof composition in which the fulminate is inclosed.

A designates a portion of the plate, which resembles the plates commonly employed in the manufacture of fire-work pellets-that is to say, it is a flat plate having in it anumber of holes, 0, equal to the number of pellets to be manufactured in a batch, said holes being entirely through it and of the size of the pellets to be produced. Only one of these holes and the surrounding portion of the plate is shown.

To manufacture the pellets, the plate A is laid flat on a table, B, and there is first placed in each hole 0 a quantity of the fire-proof composition sufficient to nearly half fill it, as shown at d in Fig. 3. The fulminate a is then placed upon and in the center of the composition (Z, as shown in Fig. 4, and afterward the hole is filled up above the fulminate with fireproof composition, as shown at e in Fig. 5. The pellet is now complete with the fuhninate eveloped in the fire-proof composition, and

in the plate A.

The fire-proof composition which I employ, preferably, is made of powdered mineral wool, with a sufficient quantity of soluble glass or liquid alkaline silicate or a sufficient quantity of a inucilage of gum-tragacanth and water to bind the particles of the wool together and make a plastic compound; but other adhesive cement or matter might be substituted for the soluble glass or gunrtragacanth mucilage.

The composition made with soluble glass will be water-proof as well as fire-proof, and that made with gum-tragacanth will be sufliciently impervious to moisture to protect the fulmiuate from the atmosphere.

IVhat I claim as myinvention, and desire to secure by Letters Patent, is-

l. A torpedo-pellet consisting of a fnlminate compound and an inclosing-envelojm of fire-proof composition, substantially as herein described.

2. A torpedo-pellet consisting of a fulminate compound and an inclosing envelope composed of mineral wool and an adhesive cement, substantially as herein described.

CONRAD PILGRIM. Vitnesses.

FREDK. HAYNES,

HENRY MOBRIDE.

when perfectly set is pushed out of the hole 0 

